_version133.py 文件源码

def bytes2int(bytes):
    """Converts a list of bytes or a string to an integer

    >>> (128*256 + 64)*256 + + 15
    8405007
    >>> l = [128, 64, 15]
    >>> bytes2int(l)
    8405007
    """

    if not (type(bytes) is types.ListType or type(bytes) is types.StringType):
        raise TypeError("You must pass a string or a list")

    # Convert byte stream to integer
    integer = 0
    for byte in bytes:
        integer *= 256
        if type(byte) is types.StringType: byte = ord(byte)
        integer += byte

    return integer